Need help with math question 20 points and brainlest

Aline passes through 3,7 and 6,9 what equation represents the line

Which of the following shows the length of the third side, in inches, of the triangle below

Question 3(multiple choice worth 1 points) use the arc length formula and the given information to find r. s = 16 cm, θ = 48°; r = ? sixty divided by pi cm thirty divided by pi cm one third cm one hundred twenty divided by pi cm